i have situation where a window washer has used steelwool to clean glass. they inform me that a fine steelwool is the industry standard for cleaning glass. these windows in question were being cleaned for the first time since they were installed, so they were fairly dirty and had some residue (sp)from a year long construction project. At close inspection we have found quite a few fine scratches. the window washer denies he is responsible. if the glass has to be replaced it could run a $100k. the glass washer cost $1880.00 and his insurance is worthless. SEND HELP and answers.